It is highly recommended that you save the iOS 4.1 SHSH Blobs before the public release of iOS 4.2 to get the untethered jailbreak for iOS 4.2. Apple has already rolled out the iOS 4.2 GM version and the final version is coming within few days after which Apple will not sign the old firmware.
Though Cydia automatically stores the SHSH Blobs of every jailbreaked idevice, but it is better to save them manually and locally with the help of TinyUmbrella.
Step 1: Download the latest TinyUmbrella.
Step 2: Run the TinyUmbrella and attach your iPhone with the PC. Make it sure that iTunes is not running.
Step 3: TinyUmbrella will automatically detect your iPhone.
Step 4: Now press the “Save SHSH” button. Depending on the load, Cydia server might take some time to process your request. Once completed you will see the saved SHSH blobs on the screen of Cydia App.
- Download the latest version of TinyUmbrella from the official site.